D. Passali, C. Cappello, G. C. Passali, C. Cingi, and C. Sarafoleanu, “Nasal muco-ciliary transport time alteration: efficacy of 18B glycyrrhetinic acid”, Multidiscip Respir Med, vol. 12, no. 1, Nov. 2017, doi: 10.4081/mrm.2017.258.